Toni Keller

The man serving a 37-year prison sentence for killing an NIU student wants his plea overturned. According to the Daily Chronicle, William Curl filed the hand-written motion from Menard Correctional Center. He claims physical issues prevented him from understanding the agreement he accepted in April.

William Curl has agreed to spend the next 37 years in prison under a special plea agreement where he acknowledged that he could be convicted of murdering Northern Illinois University freshman Antinette "Toni" Keller, even though he maintains he is innocent.

Curl, DeKalb County State’s Attorney’s Richard Schmack and DeKalb County Public Defender Tom McCulloch conferred with Judge Robbin Stuckert on Tuesday to make the arrangements, which were finalized this morning.